Injector



( Model.)

R. HARRISON.

INJECTOILV No. 48 O,921. Patentd Aug. 16, 1892.

WILQEEEEE lnvEnLmP i fi j f Harra's n UNITED. STATES -ATENT FFICE.

ROBERT HARRISON, OF ERIE, PENNSYLVANIA INJECTOR.

SPECIFICATION formng part of Letters Patent No. 480921, dated August 16,1892.

Application filed November 10, 1391. Serial No. 4ll,526. (Model) .To allwhom it may 00771067 7@.-

Be it known that I, ROBERT HARRISON, a citizen of Canada, residing atErie, in the connty of Erie and State of Pennsylvania, have inventedcertain new and useful Improvements in Injeetors; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,forming part of this specification.

My invention consists in the improvements in injectors hereinafter setforth and explained, and illustrated in the acconpanying drawings, inwhich- Figure lis a side elevation ot my improved injector. Fig. 2 is alongitudinal central section of the same.

The Construction of my inproved injector (shown in the drawings)embodies both Water lifting or ejector nechanisn and injector mechanisnplaced side by side in a shell or body A, having passages thereinconnecting the ejector and injector mechanisn together, B being thestean-passage, C a water-passage from the ejector mechanism D D' to theinjector mechanism E E', and F a passage from the injector E E' to theoverflow-valve chamber G. The ejector-tube mechanism D .D' and theinjector-tube nechanisn E E' are of usual and ordinary Construction.

Above the stean-jet tube D of the ejector I make a valve-chanber H, towhich stean is supplied through a passage I. In this chamber H there isa combined piston and disk valve h d, from which a valve-stem co extendsout through a stuffing-box Jto the end of an Operating-lever K, to whichit is pivoted, this lever K being fulcruned upon a standard L, pivotedto the body A. The pistonportion h ot' this Valve fits into the chamberc in the Valve-seat M, so as to close the lateral steanpassage b,connunicating with the steanpassage B leading to the stean-jet tube E ofthe injector, and the disk portion d of this Valve fits down upon theface of the Valveseat M, so as to close the passages e (only one ofwhich is shown) through the Valveseat M, leading to the steam-jet tube Dot' the ej ector, so that when the disk portion d of the Valve h d isfirst raised off of its seat steam is admitted to the ejector only; butwhen it is raised far enough to withdraw the pisten porton h thereof outof the chanber c then the steam is also admitted to the injector. Thevalve-chamber G, into which the overflowpassage F leads, is alsoprovided with a conibined piston and disk overflow-valve f g, having astern N passing out through a stuffingbOX O, and is pivoted to aconnecting-bar P, which extends to and is pivoted to the end of theValve-stem a, so that the steam-valve h d and the overfiow-valve f g areadapted to be moved simultaneously by means of the lever K, ashereinafter set forth. The piston portion f of the overflow-valve fitsinto and closes the overfioW-passage 75 through the valve-seat R. whenthe steam-Valve h d is open, as illustrated in Fig. 2; but When thestean-Valve is closed or only open a sufficient distance to supply steamto the ejector D D' then the pisten portion f of the oVerflow-valve f gis entirely withdrawn from the overflow-passage k, so that the overflowfrom the ejector passes through it and over the top of the valve-seab Rand down through the annular passage n. around the Valve-seat R to theoverfiow-discharge passage m; but when the steam-valve h d is raised farenough to commence to ad- 'nit stean to the injector E E' the piston fenters and closes the overfioW-passage Ic and forces the waterdischarged from the ejector to flow through the passage C to the mouthof the injector-tube E'. Meanwhile the disk portion g of theoverfloW-valve f g is still sut-- ficiently above the face of thevalve-seat R to allow the overflow from the injector passing through thepassage F into the valve-chanber G to pass down around the periphery ofthe disk g and down through the annular-passage n in the Valve-seat Rand out through the oVerfloW-outlet m,this continuing untilthesteam-Valve h d is f ully open, which operation closes the disk g ol'the overiow-valve down tightly upon the face of the Valve-seat R,entirely closing the overflow and forcing the Water discharged froni theinjector to pass on to the boiler. When, however, the stean-valve h d isclosed, the operation of closing it simultaneously opens theoverflow-valve f g, so as to open both the overfiow-passage 79 from theejector and the oVerflow-passage fron the injector, so as to oompietelydrain the waterout of both the ejector and injector.

Having thus fully described my invention, so as to enable others toeonstruct and operate the same, what I claim as new, and desire tosecure by Letters Patent of the United States, 15-

1. The combination, in an injector, of acombined piston and disksteam-inlet valve with a. combined piston and disk overflow-valve, a.bar connecting said two valves together, so that they will move inunison, and a. lever pivoted thereto for Operating said valves,substantially as and for the purpose set forth.

2. The combination, in a combined ejector and njector, of a combinedpiston and disk ROBERT HARRISON. witnesses:

J. C. STURGEON, WM. P. HAYES.

